32fbbd370c
shared with the kernel, mapped into kernel address space; kernel is notified of its location. kernel segment size is increased to make it fit. - map in kernel and other processes that don't have their own page table using single 4MB (global) mapping. - new sanity check facility: objects that are allocated with the slab allocator are, when running with sanity checking on, marked readonly until they are explicitly unlocked using the USE() macro. - another sanity check facility: collect all uses of memory and see if they don't overlap with (a) eachother and (b) free memory - own munmap() and munmap_text() functions. - exec() recovers from out-of-memory conditions properly now; this solves some weird exec() behaviour - chew off memory from the same side of the chunk as where we start scanning, solving some memory fragmentation issues - use avl trees for freelist and phys_ranges in regions - implement most useful part of munmap() - remap() stuff is GQ's for shared memory
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
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#define _SYSTEM 1
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/ds.h>
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#include <minix/endpoint.h>
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#include <minix/keymap.h>
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#include <minix/minlib.h>
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/sysutil.h>
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#include <minix/syslib.h>
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#include <minix/bitmap.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <env.h>
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#include "../proto.h"
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#include "../vm.h"
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#include "../util.h"
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#include "memory.h"
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/*===========================================================================*
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* arch_map2vir *
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*===========================================================================*/
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PUBLIC vir_bytes arch_map2vir(struct vmproc *vmp, vir_bytes addr)
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{
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vir_bytes textstart = CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_phys);
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vir_bytes datastart = CLICK2ABS(vmp->vm_arch.vm_seg[D].mem_phys);
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/* Could be a text address. */
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vm_assert(datastart <= addr || textstart <= addr);
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return addr - datastart;
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}
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/*===========================================================================*
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* arch_vir2map *
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*===========================================================================*/
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PUBLIC vir_bytes arch_vir2map(struct vmproc *vmp, vir_bytes addr)
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{
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vir_bytes bottom = CLICK2ABS(vmp->vm_arch.vm_seg[D].mem_phys);
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return addr + bottom;
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}
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/*===========================================================================*
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* arch_vir2map_text *
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*===========================================================================*/
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PUBLIC vir_bytes arch_vir2map_text(struct vmproc *vmp, vir_bytes addr)
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{
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vir_bytes bottom = CLICK2ABS(vmp->vm_arch.vm_seg[T].mem_phys);
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return addr + bottom;
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}
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